Snow plow



May 17, 1960 E. c. BAlN snow PLOW Filed Aug. 26, 1955 r 2,935,537 Patented May 17, 1960 SNOW PLOW Edwin C. Bain, Ottawa, Ontario, Canada, assignor to Dungarvon Company Limited, Ottawa, Ontario, Canada Application August 26, 1955, Serial No. 530,685

6 Claims. (Cl. 37-19) This invention relates to a snow plow of the type which is attached to the front end of a truck, a tractor or other propelled vehicle.

A preferred form of the present invention which will be described below, resembles in appearance a conventional V-type snow plow but the construction is considerably different. While the plow of the present invention may be used as an ordinary V-type plow, disposing the snow on the right and left in equal amounts, the plowing portions of the device may be turned so as to have two limiting positions whereby the snow may be entirely disposed to the right or to the left, as selected by the operator.

The invention will now be described with the assistance of the accompanying drawings wherein similar parts are denoted by identical reference numerals. It will be appreciated that various changes can be made in the structure shown and accordingly the drawings and related disclosure are to be construed by way of example and not by way of limitation.

In the drawings,

Figure 1 shows an oblique three-quarters elevational view of a portion of the rear of the plow showing particularly the features of the blowing means;

Figure 2 shows a bottom plan view as would be seen from below in Figure 1;

Figure 3 shows a fragmentary enlarged cross-sectional view taken along the line 3-3 in Figure 2, further disclosing the structure of the blowing means;

Figure 4 shows an alternative form of part of Figures 1 to 3 to illustrate a modified construction; and

Figure 5 shows a fragmentary cross-sectional view in the region of one of the jets of Figure 4.

The apparatus shown in Figures 1-5 is capable of completely clearing the road of the residue of snow by means of the new and improved blowing means shown and described.

Referring first to Figures 1 and 2, each of the mould boards 3 and 4 have attached thereto at the rear lower edges blower channels denoted by 51 and 52. A suitable skid 32 is provided between the boards 3 and 4. Blower channel 51 will be particularly described and it will be understood that blower channel 52 is similar.

The central component of blower channel 51 is a generally semi-cylindrical tapered member denoted by 57 tapering from a smaller diameter toward the center of plow to a larger diameter toward the outer edge of the mould board 4. Member 57 is attached by bolting, riveting or the like to a channel denoted by 58, which is in turn attached to the mould board.

The end of the member 57 adjacent the center of plow has attached thereto an air duct denoted by 50, connected to a suitable source of air under pressure, such as a blower. In view of the fact that air duct 50 is large, it is practical to mount the compressor (not shown) on a push frame and to provide suitable motive power, such as a small auxiliary internal combustion engine.

It is important to note that'member 57 does not extend to the outer extremity of mould board 4, and this is to provide a space into which snow will not be pushed by the mould board 4 and which will permit the snow residue under the mould board to become airborne under the action of a strong current of air.

At the side of member 57 opposite mould board 3 is attached a flap of flexible material such as rubber denoted by 59. It is contemplated that while mould board 3 will be a small distance above the road surface, flap 59 will make contact with the road surface. It might be thought that flap 59 would be subject to considerable wear, but it has been found that under ordinary winter conditions a film of ice is conveniently built up on the edge of flap 59 in contact with the road surface, and such film of ice takes most of the wear.

Blower channel 52 has member 53, channel 54, flexible flap 55 and air duct 56, all being similar to the corresponding parts already referred to.

Figure 3 shows how it is possible to blow the snow residue toward the outer edge of mould board 3. Although mould board .3 is some distance above the road surface, the snow residue and the snow piled up ahead of mould board 3 effectively seals the space between mould board 3 and the road surface. The flap 59 seals the opposite side of blower channel 51 and air applied through duct 50 picks up the snow residue and discharges it from the right-hand end of blower channel 51 to the same bank of snow as is deposited by the action of mould board 3.

In the apparatus just described the air used is contemplated to be a large volume of air under relatively low pressure, as is delivered by a blower. A smaller amount of air under high pressure may also be used, as shown in Figures 4 and 5.

In Figures 4 and 5 a semi-cylindrical member denoted by 60 is shown, which is similar to member 57, except that it is not provided with an air duct at its end toward the center of plow 1, but such end is instead closed by a transverse plate denoted by 61. A plurality of air jets denoted by 62 are provided in combination with member 60, pointing generally toward the enlarged end of member 60, and also slightly inclined toward the road surface so as to impinge on the snow residue. The member 60 would be provided with other associated components like member 57, and only the air-applying means is different.

The air lines from jets 62, one of which is shown at 63 in Figure 5, could be joined together and fed from a compressor located on the propelling vehicle. This has the advantage that the weight of the compressor gives greater traction to the propelling vehicle for obvious reasons.

Whether a blowing device as shown in Figures 12, or as in Figures 45 is provided, suitable means must be provided for supplying air selectively to one or both blower channels.

I claim:

1. In a snow plow having at least one mold-board the improvement comprising a long and relatively narrow blowing channel, the open edges thereof pointing downwards toward the surface to be cleared, at the rearward lower edge of said mold-board and extending substantially less than the length of said mold-board, the long axis of said blowing channel being positioned substantially parallel to said rearward lower edge of said moldboard, and air conduit means positioned so that air therefrom is directed between said blowing channel and the surface to be cleared and both along said rearward lower edge of said mold-board and said axis of said blowing channel and downward toward said surface.

2. A snow plow as claimed in claim 1 wherein said air conduit means comprises a plurality of air jets arranged along said axis and in said blowing channel.

l 3. In a snow plow having at least one mold board,

positioned in the channel member so thatair therefrom is directed between the blowing channel and the surface to be cleared and along a bottom edge of the'mold board and the axis of the blowing channelanddownward toward the surface to be cleared. a

4. In a snow plow according to claim 3, in which the channel member is semi-circular in cross section at one end with the other end open.

5. In a snow plow according to claim 3, in which the channel member is semi-circular with a flap secured along one longitudinal edge thereof to contact the surface to be cleared.

aaearala 6. In a snow plow according to claim 3, in which means are provided secured to the mold board to secure and support the blowing channel member.

References Cited in the file of this patent UNITED STATES PATENTS 227,011 Horton Apr. 27, 1880 1,891,046 Gettelman Dec. 13, 1932 2,061,585 Meyer Nov. 24, 1936 2,222,437 Lykken Nov. 19, 1940 2,436,956 Du Pras Mar. 2, 1948 2,642,294 Holm June 16, 1953 2,711,597 Werner et a1. June 29, 1955 2,775,830 Kenyon Jan. 1, 1957 2,802,286 Wylie Aug. 13,1957 

